Technology for Science is a National Science Foundation funded program that is developing and testing curriculum units for teacher materials built around a series of design-oriented science problems called "challenges," mainly for ninth-grade general and physical science classes. Technology for science challenges have a clear connection to science concepts, allow for multiple solutions, engage, and motivate students. Solutions must be low-tech and easy to make. Three-to-six week curriculum units have been created around the following topics: Motion and Measurement, Electricity and Magnetism, and Heat. In each unit, students define and research problems, collaboratively design and build solutions, present plans and results to classmates, and reflect upon their work. Each activity contains: concepts, materials, design challenges, and student assessment. (MKR)